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MASS FRACTION BURNED ANALYSIS - Instytut …
mass FRACTION BURNED ANALYSIS Krzysztof Z. Mendera, Andrzej Spyra, Micha Smereka Technical University of Cz stochowa Institute of Internal Combustion Engines and Control Engineering Al. Armii Krajowej 21, 42-200 Cz stochowa, Abstract Common algorithms for mass FRACTION BURNED computations are presented and compared. Some potential problems of these calculations are also discussed. The comparison shows that the evaluation of polytropic indices, necessary for current procedure may lead to some ambiguity in MFB determination. 1. Introduction An internal combustion engine gains its energy from the heat released during the combustion of the oxidizer-fuel mixture. Engine processes leading to the conversion of the chemical energy contained in the fuel are complex phenomena that occur in transient thermodynamic conditions and the reliable evaluation of these processes is the key to engine optimization and effective control - combustion processes inside the engine cylinder dictate engine power, efficiency and emissions.
Δ = − = + + 1. 1 1. n i i v i i i. V V p p p p. The MFB profile calculated according to Rassweiler and Withrow procedure is presented in Fig.2 (generated using [8]).
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